摘要:
The invention describes an improved process for synthesizing 1-&bgr;-methyl-2-hydroxymethyl substituted carbapenems as key intermediates for the synthesis of anti-MRSA carbapenem antibiotics. The synthesis eliminates the use of BU3SnCH2OH and HMPA, which are toxic substances and not amenable to industrial scale production. The novel intermediates are also within the scope of this invention. The invention relates to the synthesis of a compound of formula 3: wherein R1 represents H or a suitable protecting group for an alcohol; R2 represents H or methyl; and R5 represents a carboxy protecting group as well as the compounds made therein.
摘要:
A process for preparation of a compound of formula I: wherein: R1 represents CH3 or H; and P represents a protecting group; comprising reacting a compound of formula IV: wherein R1 and P and are defined above and R4 represents triflate or SO2F; in the presence of a catalyst and (R3)3SnCH2OP″, wherein each R3 represents C1-4 lower alkyl, and P″ represents H or a protecting group, to yield the compound of formula I.
摘要:
The present invention relates to a process for synthesizing novel intermediates of formula III: ##STR1## wherein R.sup.1 is a halogen. The intermediate compounds described herein are useful for the preparation of carbapenem compounds.
摘要:
A process of synthesizing a carbapenem compound of formula 6: is disclosed using a compound of formula 4′: The intermediate compounds that are described herein are also included in the present invention.
摘要:
A process of synthesizing a carbapenem compound of formula 6: ##STR1## is disclosed using a compound of formula 4': ##STR2## The intermediate compounds that are described herein are also included in the present invention.
摘要:
Enantiomerically pure S-etifoxine and pharmaceutically acceptable salts, solvates, hydrates or prodrugs thereof are provided. Also provided are pharmaceutical compositions comprising the compounds and methods of treating disorders associated with central nervous system using the compounds and pharmaceutical compositions.